Water adsorption behaviour of polyacrylic acid grafted and polyethylene glycol crosslinked deproteinised natural rubber

IF 1.5 4区化学 Q4 POLYMER SCIENCE

Journal of Rubber Research Pub Date : 2025-05-06 DOI:10.1007/s42464-025-00298-2

Yizhong Yuan, Jie Shen, Xiaohui Tian, Pengcheng Li, Jiayang Gao

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Abstract

With the depletion of petrochemical resources, natural rubber (NR) shows its application potential. On the basis of deproteinised natural rubber (DPNR), a hydrophilic and water-absorbent polymer network composed of a deproteinised natural rubber-grafted-poly(acrylic acid) (DPNR-g-PAA) system and linear polyethylene glycol (PEG) was designed and fabricated. The graft copolymerisation of DPNR with acrylic acid (AA) was initiated by a redox initiator system consisting of potassium persulfate (KPS) and sodium hydrogen sulfite (NaHSO₃) under nitrogen, followed by the addition of PEG to the system. The key factors influencing the grafting efficiency of DPNR-g-PAA were investigated, including reaction temperature, mixing time and AA content. The grafting system was finally attached to the hydrophilic polymer PEG. Water adsorption behaviour tests and water contact angle experiments indicated that grafting PAA and linking PEG in DPNR latex increased hydrophilicity. The results indicated that the maximum water absorption of DPNR-g-PAA was 78.24 ± 5.06% and the minimum of water contact angle of DPNR-g-PAA@PEG was 9.58 ± 1.37°. Through the modification of PAA and PEG, the DPNR-g-PAA@PEG product improves the hydrophilicity of DPNR, which has the potential for application in water retention agents and slow-release fertilizers.

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聚丙烯酸接枝和聚乙二醇交联脱蛋白天然橡胶的水吸附行为

随着石油化工资源的日益枯竭，天然橡胶的应用潜力日益显现。在脱蛋白天然橡胶（DPNR）的基础上，设计并制备了由脱蛋白天然橡胶-接枝聚丙烯酸（DPNR-g- paa）体系和线性聚乙二醇（PEG）组成的亲水吸水性聚合物网络。以过硫酸钾（KPS）和亚硫酸氢钠（NaHSO3）组成的氧化还原引发剂体系在氮气条件下引发DPNR与丙烯酸（AA）的接枝共聚，然后在体系中加入PEG。研究了影响DPNR-g-PAA接枝效率的关键因素，包括反应温度、混合时间和AA含量。接枝体系最终被接枝到亲水性聚合物PEG上。水吸附性能测试和水接触角实验表明，接枝PAA和连接PEG提高了DPNR胶乳的亲水性。结果表明，DPNR-g-PAA的最大吸水率为78.24±5.06%，DPNR-g-PAA@PEG的最小水接触角为9.58±1.37°。通过对PAA和PEG进行改性，DPNR-g-PAA@PEG产物提高了DPNR的亲水性，在保水剂和缓释肥料中具有应用潜力。

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来源期刊

Journal of Rubber Research 化学-高分子科学

自引率

15.40%

发文量

审稿时长

3 months

期刊介绍： The Journal of Rubber Research is devoted to both natural and synthetic rubbers, as well as to related disciplines. The scope of the journal encompasses all aspects of rubber from the core disciplines of biology, physics and chemistry, as well as economics. As a specialised field, rubber science includes within its niche a vast potential of innovative and value-added research areas yet to be explored. This peer reviewed publication focuses on the results of active experimental research and authoritative reviews on all aspects of rubber science. The Journal of Rubber Research welcomes research on: the upstream, including crop management, crop improvement and protection, and biotechnology; the midstream, including processing and effluent management; the downstream, including rubber engineering and product design, advanced rubber technology, latex science and technology, and chemistry and materials exploratory; economics, including the economics of rubber production, consumption, and market analysis. The Journal of Rubber Research serves to build a collective knowledge base while communicating information and validating the quality of research within the discipline, and bringing together work from experts in rubber science and related disciplines. Scientists in both academia and industry involved in researching and working with all aspects of rubber will find this journal to be both source of information and a gateway for their own publications.